Lazzaro, M., Costanzo, A., Farag, D.H. and Bàrberi, P. 2017. Grain yield and competitive ability against weeds in modern and heritage common wheat cultivars are differently influenced by sowing density. Italian Journal of Agronomy. 12, 4 (Dec. 2017). DOI:https://doi.org/10.4081/ija.2017.901.